Can someone , ? ?
chemistry

9. the molecular mass of sodium oxide (na2o) is
a. 61.97894.
b. 22.98977.
c. 38.98917.
d. 45.97954.

10. a substance that contains hydrogen that may be replaced by a metal is a/an
a. colloid.
b. acid.
c. nonmetal.
d. base

Calculate: select the worksheet tab. this tab you calculate the analyte concentration.  fill in the first set of boxes ("moles h2so4" and "moles naoh") based on the coefficients in the balanced equation. (if there is no coefficient, the value is 1.)  record the appropriate volumes in the "ml naoh" and "ml h2so4" boxes.  record the concentration of the titrant in the m naoh box. click calculate. what is the concentration listed

What is the molar mass of a gas that has density of 2.054 g/l

What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?